<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表过滤</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.7.14/vue.min.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyword">
        <ul>
            <li v-for="(p,index) in filPersons" :key="index">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul> 
    </div>
    <script>
        Vue.config.productionTip = false;
        // 用watch实现
      /*   new Vue({
            el:"#root",
            data:{
                keyword:"",
                persons:[
                    {id:"001",name:"周冬雨",age:18,sex:"女"},
                    {id:"002",name:"马冬梅",age:30,sex:"女"},
                    {id:"003",name:"周杰伦",age:38,sex:"男"},
                    {id:"004",name:"温兆伦",age:40,sex:"男"}
                ],
                filPersons:[]
            },
            watch:{
                keyword:{
                    immediate:true,
                    handler(val){
                        this.filPersons=this.persons.filter((p)=>{
                            return p.name.indexOf(val) !==-1;
                        });
                    }
                }
            }
        }); */
        // 用computed实现
        new Vue({
            el:"#root",
            data:{
                keyword:"",
                persons:[
                    {id:"001",name:"周冬雨",age:18,sex:"女"},
                    {id:"002",name:"马冬梅",age:30,sex:"女"},
                    {id:"003",name:"周杰伦",age:38,sex:"男"},
                    {id:"004",name:"温兆伦",age:40,sex:"男"}
                ]
            },
            computed:{
                filPersons:{
                  get(){//可以简写
                    return this.persons.filter((p)=>{
                            return p.name.indexOf(this.keyword) !==-1;
                        });
                  }
                }
            }
        });
    </script>
</body>
</html>